Sitecore 9.1 installation was the smoother as ever, I have setup almost 10+ machines for Sitecore 9.0.x installations and faced troubles. My previous article for the installation with SIFless was handy, I get most views on that article.
If you are lazy enough to go through the Sitecore Installation documentation, follow this article for getting ready your Sitecore 9.0.x instance ready quickly. This installation is valid for Sitecore 9.0.1 and Sitecore 9.0.2 versions. If you want to install the latest version, Sitecore Experience Platform 9.1 Initial Release download it and check how to install Sitecore XP 9.1.